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Example spectrograms of (A) a 6-call vocal sequence, (B) an 8-call sequence, and (C) a 24-call sequence from the same study male. Brackets on the spectrograms denote the start and end of each call, and the lowercase letters above the brackets represent different call types: (a) exhale grunt, (b) inhale grunt, (c) exhale moan, (d) inhale moan, (e) wobble, and (f) yawn. Spectrograms were made in Avisoft SAS Lab-Pro (version 5.1.12; Avisoft Bioacoustics).
